AMD Ryzen 5 PRO 7645 vs AMD Ryzen 7 6800HS Comparison

FAQ

Q: Which processor has the higher average benchmark score?

A: The AMD Ryzen 5 PRO 7645 has an average benchmark score of 32446, while the AMD Ryzen 7 6800HS scores 32354. The Ryzen 5 PRO 7645 leads by a slim 0.3% margin, placing both processors at the 83rd percentile among all CPUs.

Q: How large is the multi-core performance gap in Cinebench R23?

A: The Ryzen 5 PRO 7645 scores 21710 in Cinebench R23 multi-core, compared to 11992 for the Ryzen 7 6800HS. This represents an 81% advantage for the Ryzen 5 PRO 7645, making it the single largest multi-core win in the head-to-head comparison.

Q: Does the Ryzen 7 6800HS win any benchmarks?

A: Yes, the Ryzen 7 6800HS wins 4 out of 15 head-to-head benchmarks. Its wins include PassMark data compression (292698 vs 286298), data encryption (18104 vs 16657), floating point math (47533 vs 45202), and integer math (84228 vs 74782).

Q: What is the difference in single-core performance between the two?

A: The Ryzen 5 PRO 7645 dominates single-core tests. In Cinebench R23 single-core, it scores 3065 versus 1455 for the Ryzen 7 6800HS, a 110.7% advantage. The PassMark single-thread test shows a smaller but still significant lead of 14.7% (3652 vs 3184).

Q: How do the core and thread counts differ?

A: The Ryzen 5 PRO 7645 has 6 cores and 12 threads, while the Ryzen 7 6800HS has 8 cores and 16 threads. Despite having fewer cores, the Ryzen 5 PRO 7645 wins the majority of multi-threaded benchmarks.

Q: What are the power consumption profiles?

A: The Ryzen 5 PRO 7645 has a TDP of 65 watts, while the Ryzen 7 6800HS has a TDP of 35 watts. The Ryzen 7 6800HS is rated for substantially lower power draw, consistent with its mobile market segment.

Architecture Differences

The two processors represent different generations of AMD architecture. The Ryzen 5 PRO 7645 uses Zen 4 architecture (codenamed Raphael) built on a 5 nm process at TSMC, while the Ryzen 7 6800HS uses Zen 3+ architecture (codenamed Rembrandt) on a 6 nm process. The die size difference is notable: the Ryzen 5 PRO 7645 has a 71 mm² die with 6,570 million transistors, while the Ryzen 7 6800HS has a 208 mm² die with no transistor count listed in the data.

Cache configurations differ significantly between the two. The Ryzen 5 PRO 7645 has 1 MB of L2 cache per core and 32 MB of shared L3 cache. The Ryzen 7 6800HS has 512 KB of L2 cache per core and 16 MB of shared L3 cache. Both share the same 64 KB L1 cache per core. The Ryzen 5 PRO 7645's larger cache structure contributes to its performance advantage in many workloads.

The platform differences are substantial. The Ryzen 5 PRO 7645 uses AMD Socket AM5 with PCIe Gen 5 support across 24 CPU lanes and supports ECC memory. The Ryzen 7 6800HS uses AMD Socket FP7 with PCIe Gen 4 across 20 lanes and no ECC support. Both support DDR5 memory in dual-channel configuration, but the Ryzen 5 PRO 7645 has higher memory bandwidth at 83.2 GB/s versus 76.8 GB/s for the Ryzen 7 6800HS.

The integrated graphics differ: the Ryzen 5 PRO 7645 features Radeon Graphics while the Ryzen 7 6800HS features the Radeon 680M. The Ryzen 5 PRO 7645 targets the server/workstation market segment, while the Ryzen 7 6800HS is designed for mobile platforms. The Ryzen 5 PRO 7645 was released on 2023-06-12, while no release date is provided for the Ryzen 7 6800HS.

Where Each One Wins

The Ryzen 5 PRO 7645 wins 11 of the 15 head-to-head benchmarks, establishing clear superiority in most computing tasks. Its largest victories come in CPU-intensive workloads: prime number finding shows a 253.6% advantage (198 vs 56), Cinebench R23 single-core shows 110.7% (3065 vs 1455), and Cinebench R23 multi-core shows 81% (21710 vs 11992). Physics calculations also favor the Ryzen 5 PRO 7645 by 58.4% (1598 vs 1009). The processor leads in Cinebench R15 multi-core by 10.1%, Cinebench R15 single-core by 31.6%, PassMark extended instructions by 8.4%, multi-thread by 11.8%, random string sorting by 14.2%, and single-thread tests by 14.7%.

The Ryzen 7 6800HS wins 4 benchmarks, all in PassMark's math and data processing categories. Its largest win is in integer math at 11.2% (84228 vs 74782), followed by data encryption at 8% (18104 vs 16657), floating point math at 4.9% (47533 vs 45202), and data compression at 2.2% (292698 vs 286298). These wins suggest the Ryzen 7 6800HS has specific strengths in certain computational patterns, likely related to its higher core count.

The benchmark data indicates the Ryzen 5 PRO 7645 is the stronger all-round performer despite having fewer cores. The Ryzen 7 6800HS only exceeds in narrow mathematical workloads where its additional cores provide an advantage. For general productivity, content creation, and single-threaded applications, the Ryzen 5 PRO 7645 is clearly superior.

Specification Differences

| Specification | AMD Ryzen 5 PRO 7645 | AMD Ryzen 7 6800HS |

|---|---|---|

| Series | 7000 series | 6000 series |

| Cores | 6 | 8 |

| Threads | 12 | 16 |

| Base Clock | 3.80 GHz | 3.20 GHz |

| Boost Clock | 5.10 GHz | 4.70 GHz |

| TDP | 65 W | 35 W |

| Socket | AMD Socket AM5 | AMD Socket FP7 |

| Architecture | Zen 4 | Zen 3+ |

| Codename | Raphael | Rembrandt |

| Process Node | 5 nm | 6 nm |

| Transistors | 6,570 million | Not listed |

| Die Size | 71 mm² | 208 mm² |

| L2 Cache | 1 MB (per core) | 512 KB (per core) |

| L3 Cache | 32 MB (shared) | 16 MB (shared) |

| Memory Bandwidth | 83.2 GB/s | 76.8 GB/s |

| ECC Memory | Yes | No |

| PCIe | Gen 5, 24 Lanes | Gen 4, 20 Lanes |

| Integrated Graphics | Radeon Graphics | Radeon 680M |

| Market Segment | Server/Workstation | Mobile |

Head-to-Head Benchmarks

The Cinebench results tell a story of overwhelming dominance for the Ryzen 5 PRO 7645. In Cinebench R23 multi-core, the Ryzen 5 PRO 7645 scores 21710 against 11992 for the Ryzen 7 6800HS, an 81% lead. The single-core result is even more lopsided: 3065 versus 1455, a 110.7% advantage. Cinebench R15 shows similar patterns with a 10.1% multi-core lead (2188 vs 1987) and a 31.6% single-core lead (308 vs 234). These results indicate the Ryzen 5 PRO 7645's Zen 4 architecture delivers substantially better per-core performance and scales better in multi-threaded rendering workloads.

PassMark results are more evenly split. The Ryzen 5 PRO 7645 wins the multi-thread test with 25489 versus 22801, an 11.8% margin. Physics performance shows a 58.4% lead (1598 vs 1009). Prime number finding demonstrates the most extreme disparity at 253.6% (198 vs 56). Extended instructions favor the Ryzen 5 PRO 7645 by 8.4% (21813 vs 20114), and random string sorting by 14.2% (34557 vs 30266). Single-thread performance shows a 14.7% lead (3652 vs 3184).

The Ryzen 7 6800HS counters in four PassMark categories. Integer math shows its best result with 84228 versus 74782, an 11.2% win. Data encryption follows at 8% (18104 vs 16657). Floating point math shows a 4.9% advantage (47533 vs 45202), and data compression a 2.2% edge (292698 vs 286298). These wins demonstrate that the Ryzen 7 6800HS's additional cores and threads provide tangible benefits in specific computational patterns, though not enough to overcome the Ryzen 5 PRO 7645's architectural efficiency overall.

The average benchmark scores reinforce the close overall competition: 32446 for the Ryzen 5 PRO 7645 versus 32354 for the Ryzen 7 6800HS, a mere 0.3% difference. Both processors sit in the 83rd percentile of all CPUs, with the Ryzen 5 PRO 7645's nearest rivals including the Intel Core i5-14400F (0.5% behind) and AMD Ryzen 7 PRO 8840U (0.7% behind), while the Ryzen 7 6800HS's rivals include the Intel Core i9-11900 (0.4% ahead) and Intel Core i5-14400F (0.2% behind).

The Verdict

The AMD Ryzen 5 PRO 7645 is the clear performance winner, taking 11 of 15 head-to-head benchmarks with decisive margins in most categories. Its 81% lead in Cinebench R23 multi-core and 110.7% lead in single-core make it the obvious choice for rendering, productivity, and general computing tasks. The 253.6% advantage in prime number finding highlights exceptional computational efficiency that extends to many scientific and engineering workloads.

The Ryzen 7 6800HS retains relevance in specific scenarios. Its 35-watt TDP makes it suitable for power-constrained mobile environments where the Ryzen 5 PRO 7645's 65-watt rating would be impractical. The wins in integer math, floating point math, data encryption, and data compression suggest workloads heavy in these operations could see modest benefits from the Ryzen 7 6800HS's 8-core configuration.

For workstation and desktop users prioritizing raw performance, the Ryzen 5 PRO 7645 is the definitive choice. Its Zen 4 architecture, larger cache, higher clocks, and PCIe Gen 5 support create a compelling package for demanding applications. The server/workstation market segment designation further confirms its intended use case.

For mobile users requiring balanced performance with lower power consumption, the Ryzen 7 6800HS offers competent performance with 83rd percentile standing. Its smaller benchmark wins in specific mathematical operations provide some utility, but the overall performance gap to the Ryzen 5 PRO 7645 is substantial.

The data ultimately shows two processors at similar average performance levels but with very different characteristics. The Ryzen 5 PRO 7645 delivers exceptional per-core performance and multi-threaded scaling, while the Ryzen 7 6800HS offers a more power-efficient package with competitive performance in select workloads. The choice between them should be driven by platform requirements and power constraints rather than raw benchmark comparisons.